Gestational hypertension is divided into three categories: first, elevated blood pressure purely due to pregnancy, which generally occurs after 20 weeks of pregnancy, and can be divided into three subcategories, the first is gestational hypertension, only elevated blood pressure without combined proteinuria and edema; the second is a more serious case of elevated blood pressure combined with proteinuria and edema, also known as pre-eclampsia; the third category of patients with convulsions, endangering the life of the pregnant woman and the fetus The third type of patients have convulsions that endanger the life of the pregnant woman and the fetus, called eclampsia. Second, the pregnant woman originally had high blood pressure, and after pregnancy, blood pressure will be even higher, belonging to the pregnancy combined with chronic hypertension. Thirdly, chronic hypertension, which already has high blood pressure before 20 weeks of pregnancy, but does not have proteinuria and edema.